X-Ray microtomography - studies of a facemask

A sample of size 2.4 x 3.2 x 1.4 mm (Width, Height, Thickness) was cut from the centre of a face mask and scanned using a 3D X-ray Microscope (Zeiss Xradia 510 Versa) at Luleå University of Technology (LTU). The sample comes from a new commercially available face mask  of protection class FFP2.

A sample of size 2.4 x 3.2 x 1.4 mm (Width, Height, Thickness) was cut from the centre of a face mask and scanned using a 3D X-ray Microscope (Zeiss Xradia 510 Versa) at Luleå University of Technology (LTU).
For more information on the system see 3D mikrotomografi.

The results show three different filter layers of varying fiber size distribution. The filter at left hand side (1) has a fiber diameter of approximately 20 𝛍m. The filter in the middle (2) has a finer microstructure with a fiber diameter of 5-10 𝛍m, while the filter at the right hand side (3) is coarser with a fiber diameter of roughtly 30 𝛍m. The spatial resolution in terms of voxel size is 3.7 𝛍m.

Face mask, sample and scan spec

• Scanned using a 3D X-ray Microscope (Zeiss Xradia 510 Versa) at Luleå University of Technology (LTU)
• New commercially available face mask (protection class FFP2)
• Sample size: 2.4 x 3.2 x 1.4 mm (Width, Height, Thickness)
• Spatial resolution, voxel size: 3.7 μm